Decompression Connector - Construction: Inside there is a rigid steel tube, wrapped with high quality foam on the outside to reduce pressure and slip. - Feature: The dumbbell handle uses precision threading. Its compact size and versatility allow the adjustable dumbbell bar to support a variety of movement patterns for targeted strength gains. - Function: PVC PP nut with recessed thread design keeps weight plates securely in place and prevents slipping during exercise. - Application: Make your dumbbell a barbell. A reliable replacement for your old barbell bar, effectively improving your strength training. Ideal for use with household fitness equipment. - Use scenarios: 1) Convert an existing dumbbell for bench presses, overhead presses, or bent-over rows at home with standard weight plates. 2) Perform barbell-style squats or lunges with secure plate retention and a comfortable grip. 3) Safe, light-load training or rehabilitation sessions using your current dumbbell setup.